MSTE B-E 2 Flashcards
(99 cards)
Venusian batfish come in three sexes, which are
indistinguishable (except by Venusian batfish). How
many live specimens must our astronauts bring home in
order for the odds to favor the presence of a “mated
triple” with its promise of more little batfish to come?
A. Five specimens (50/81)
B. Five specimens (50/86)
C. Five specimens (50/85)
D. Five specimens (50/84)
A.
In a carnival game, 12 white balls and 3 black balls are
put in an opaque bottle, shaken up, and drawn out one
at a time. The player gets 25 cents for each white ball
which emerges before the first black ball. If he pays one
dollar to play, how much can he expect to win (or lose)
on each game.
A. Average gain of a quarter a game
B. Average loss of a quarter a game
C. Average loss of two quarters a game
D. Average win of a quarter a game
B.
In the binary system there are only two positive integers
containing no digit more than once, namely 1 and 10.
How many are there in base ten?
A. 8,677,960 integers
B. 7,677,690 integers
C. 8,776,690 integers
D. 8,677,690 integers
D.
In the final seconds of the game, your favorite N.B.A.
team is behind 117 to 118. Your center attempts a shot
and is fouled for the 2nd time in the last 2 minutes as
the buzzer sounds. Three to make two in the penalty
situation. Optimistic? Note: the center is only a 50% free
thrower. What are your team’s overall chances of
winning?
A. 12/16 (75%)
B. 11/16 (69%)
C. 11/15 (73.3%)
D. 10/16 (62.5%)
B.
One of a pair of dice is loaded so that the chance of a 1
turning up is 1/5, the other faces being equally likely. Its
mate is loaded so that the chance of a 6 turning up is
1/5, the other faces being equally likely. How much does
this loading increase the probability of throwing a 7 with
the two dice?
A. 1/750
B. 1/350
C. 1/550
D. 1/650
A.
A sharp operator makes the following deal. A player is
to toss a coin and receive 1, 4, 9, … n^2 dollars if the
first head comes up on the first, second, third, … n-th
toss. The sucker pays ten dollars for this. How much can
the operator expect to make if this is repeated a great
many times?
A. 8
B. 7
C. 6
D. 10
C.
If all the 720 permutations of the digits 1 through 6 are
arrange in numerical order, what is the 417th term?
A. 432615
B. 423451
C. 435261
D. 432516
D.
The local weather forecaster says, “no rain” and his
record is 2/3 accuracy of prediction. But the Federal
Meteorological Service predicts rain, and their record is
3/4. With no other data available, what is the chance of
rain?
A. 1/5
B. 4/5
C. 5/5
D. 3/5
D.
In 1969, the World Series began in the stadium of
American League pennant winner. Assume the
contenders are evenly matched. What is the probability
that the series ended where it began?
A. 3/8
B. 4/8
C. 5/8
D. 6/8
C.
In a carnival game 5 balls are tossed into a square box
divided into 4 square cells, with baffles to insure that
every ball has an equal chance of going in any cell. The
player pays $1 and receives $1 for every cell which is
empty after the 5 balls are thrown. How much does the
operator expect to make per game?
A. 4¢
B. 5¢
C. 6¢
D. 3¢
A.
Having lost a checker game, a specialist in learning
programs threw one of the red checkers out the window.
His wife reboxed the 12 black pieces and 11 red pieces
one at a time in random fashion. The number of black
checkers in the box always exceeded the number of
reds. What was the a priori probability of this
occurrence.
A. 1/22
B. 1/23
C. 1/24
D. 1/25
B.
To stimulate his son in the pursuit of partial differential
equations, a math professor offered to pay him $8 for
every equation correctly solved and to fine him $5 for
every incorrect solution. At the end of 26 problems,
neither owed any money to the other. How many did the
boy solve correctly?
A. 15 problems
B. 9 problems
C. 12 problems
D. 10 problems
D.
An expert on transformer design relaxed one Saturday
by going to the races. At the end of the first race, he had
doubled his money. He bet $30 on the second race and
tripled his money. He bet $54 on the third race and
quadrupled his money. He bet $72 on the fourth race
and lost it, but still had $48 left. With how much money
did he start?
A. 28$
B. 29$
C. 38$
D. 39$
B.
Between Sing-Sing and Tarry-Town,
I met my worthy friend, John Brown,
And seven daughters, riding nags,
And everyone had seven bags.
In every bag were thirty cats,
And every cat had forty rats,
Besides a brood of fifty kittens.
All but the nags were wearing mittens!
Mittens, kittens - cats, rats - bag, nags - Browns,
How many were met between the towns?
A. 764,488
B. 746,488
C. 766,488
D. 744,488
A.
Dr. Reed, arriving late at the lab one morning, pulled out
his watch and said, “I must have it seen to. I have
noticed that the minute and the hour hand are exactly
together every sixty-five minutes.” Does Dr. Reed’s
watch gain or lose, and how much per hour?
A. 60/143 minutes
B. 61/143 minutes
C. 60/144 minutes
D. 60/142 minutes
A.
At this moment, the hands of a clock in the course of
normal operation describe a time somewhere between
4:00 and 5:00on a standard clock face. Within one hour
or less, the hands will have exactly exchanged
positions; what time is it now?
A. 4:25.85
B. 4:26.95
C. 4:26.58
D. 4:26.85
D.
Two men are walking towards each other at the side of
a railway. A freight train overtakes one of them in 20
seconds and exactly ten minutes later meets the other
man coming in the opposite direction. The train passes
this man in l8 seconds. How long after the train has
passed the second man will the two men meet?
(Constant speeds are to be assumed throughout.)
A. 5563 seconds
B. 5562 seconds
C. 5662 seconds
D. 5560 seconds
B.
[NOV 2023] Using the French Tricolor as a model, how
many flags are possible with five available colors if two
adjacent rows must not be colored the same?
A. 45 flags
B. 55 flags
C. 50 flags
D. 40 flags
C.
A cubic box with sides ‘a’ feet long is placed flat against
a wall. A ladder ‘p’ feet long is placed in such a way that
it touches the wall as well as the free horizontal edge of
the box. If a = 1 and p = sqrt(15), calculate at what height
the ladder touches the wall from the floor
A. 3.63 or 1.38 feet
B. 3.62 or 1.38 feet
C. 3.83 or 1.38 feet
D. 3.39 or 1.38 feet
A.
[NOV 2017] Dr. Irving Weiman, who is always in a hurry,
walks up an up-going escalator at the rate of one step
per second. Twenty steps bring him to the top. Next day
he goes up at two steps per second, reaching the top in
32 steps. How many steps are there in the escalator?
A. 90 steps
B. 80 steps
C. 70 steps
D. 50 steps
B.
Citizens of Franistan pay as much income tax
(percentagewise) as they make rupees per week. What
is the optimal salary in Franistan?
A. 60 rupees
B. 55 rupees
C. 70 rupees
D. 50 rupees
D.
There are nine cities which are served by two competing
airlines. One or the other airline (but not both) has a
flight between every pair of cities. What is the minimum
number of triangular flights (i.e., trips from A to B to C
and back to A on the same airline)?
A. 13 triangular flights
B. 11 triangular flights
C. 10 triangular flights
D. 12 triangular flights
D.
Two snails start from the same point in opposite
directions toward two bits of food. Each reaches his
destination in one hour. If each snail had gone in the
direction the other took, the first snail would have
reached his food 35 minutes after the second. How do
their speeds compare?
A. The first snail traveled at three-fourths the speed
of the second
B. The first snail traveled at two-thirds the speed of the second.
C. The first snail traveled at three-fifths the speed of the second.
D. The first snail traveled at four-thirds the speed of the second.
A.
A necklace consists of pearls which increase uniformly
from a weight of 1 carat for the end pearls to a weight of
100 carats for the middle pearl. If the necklace weighs
altogether 1650 carats and the clasps and string
together weigh as much (in carats) as the total number
of pearls, how many pearl does the necklace contain?
A. 33 pearls
B. 32 pearls
C. 34 pearls
D. 31 pearls
A.