FUN WITH MATHEMATICS
BRAIN-TEASERS
PUZZLES & RIDDLES
Solve the number riddles:
(i) Tell me who I am! Who I am!
Take away from me the number eight,
Divide further by a dozen to come up with A full team for a game of cricket!
(ii) Add four to six times a number,
To get exactly sixty four!
Perfect credit is yours to ask for
If you instantly tell the score!
Answer: _______
140
(II)10
Solve the teasers:
(i) There was in the forest an old Peepal tree
The grand tree had branches ten and three
On each branch there lived birds fourteen
Sparrows brown, crows black and parrots green!
Twice as many as the parrots were the crows
And twice as many as the crows were the sparrows!
We wonder how many birds of each kind
Aren’t you going to help us find?
Answer: _______
(i) Sparrows: 104, crows: 52, Parrots: 26
I have some five-rupee coins and some two-rupee coins. The number of two-rupee coins is twice the number of five-rupee coins. The total money I have is 108 rupees. So how many five-rupee coins do I have? And how many two-rupee coins?
Answer: _______
(II)Number of 5 coins = 12, Number of 2 coins = 24
I have 2 vats each containing 2 mats. 2 cats sat on each of the mats. Each cat wore 2 funny old hats. On each hat lay 2 thin rats. On each rat perched 2 black bats. How many things are in my vats?
Answer: _______
124
Twenty-seven small cubes are glued together to make a big cube. The exterior of the big cube is painted yellow in colour. How many among each of the 27 small cubes would have been painted yellow on
(i) only one of its faces?
(ii) two of its faces?
(iii) three of its faces?
Answer: _______
(I) 6
(II) 10
(III) 8
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