self Maths Puzzle

Mohammed has 5 weights with him. He weighs two at a time and gets the recordings as 122, 123, 125, 127, 128, 129, 130, 131, 132 and 133. Find the maximum weight present with him.
Ops: A. 67
B. 64
C. 62
D. 70

Read Solution (Total 1)

Ans:A 67
suppose 5 weights are a,b,c,d,e
Making set of two weights at a time
a+b =122
a+c=123
a+d=125
a+e=127
b+c=128
b+d=129
b+e=130
c+d=131
c+e=132
d+e=133
Adding all will give a+b+c+d+e=320
Substituting a+b=122 and c+d=131
we get e=67
d+e=133
d=66
Similarly c=65,b=63,a=58
11 years agoHelpfull: Yes(1) No(0)

self Other Question

There are two coins; one of radius r1 and the other of radius r2. The r1 coin is made to rotate around the circumference of r2. What is the number of rotations r1 will make around its own axis?

Ops: A. r2/r1
B. (r1+r2)/r1
C. (r2-r1)/r1
D. 2 * r2/r1 There are three piles of coins. Pile A consists of one coin, pile B consists of two coins, and pile C consists of three coins. These are to be used in a game played by Anita and Brinda. The game requires that:
i. In each turn a player takes either one coin from a pile or all the coins in a pile.
ii. The player who has to take the last coin loses

Anita plays first. How many coins must she pick and from which pile to ensure her victory?
Ops: A. All coins from pile 2
B. All coins from pile 3
C. One coin from pile 1
D. One coin from pile 2