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Answers

Answers to Grains of Rice Page 5

1. 50 grams. If I grain weighs 1/2 gram, 2 grains will weigh 1gm.

How many 2’s in 100? 100/2 = 50. 50 x 1 = 50.

1. 199 times. On Day 1, she would have uttered God’s name 100 times while offering hundred grains. That would leave 9900 grains (10,000 - 100 = 9900). 9900 + 100=99. 100+99= 199.
2. 100 days. 10,000 + 100= 100 days.

Answers to Why do We Need Big Numbers Page 11

1. a) 5 b) 7 c) 6 d) 7 e)8
2. Less than 5 billion years ago, or 5000 million years ago. 5,000,000,000 years ago.
3. 109 crores.
4. One third of a second.

Answer to Everyone in their place Page 13

1. 900. 1945 has 9 hundreds in addition to 1 thousand, 4 tens and 5 units.
2. 5. The sum or total of the three numbers is 3574.

Answers to Odd Fish Page 19

1. 50. To sell 50 fish, Grandpa would have to catch 100 fish on Day 1. The odd ones went back into the river.
2. Less. He threw back 49 fish. 50 fish went into the basket.
3. They are prime numbers. 2 can be divided by 1 and 2. 3 can be divided by 1 and 3. Four can be divided by 1, 2, and 4. 4 is not a Prime number.

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