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प्रश्न
Ask your friend rite — W down your A age. dd 5 to it. Multiply the sum by 2. Subtract 10 from it. Next, divide it by 2. What do you get?
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उत्तर
Let the age of my friend be 9 years.
Adding 5 to it, we get
9 + 5 = 14
Multiplying this sum by 2, we get
14 × 2 = 28
Subtracting 10 from 28, we get
28 − 10 = 18
Dividing it by 2, we get
18 ÷ 2 = 9
The answer is the same as my friend’s age.
संबंधित प्रश्न
Circle the multiples of 9 (by using casting out nine).
23769
Circle the correct addition fact (by using casting out nine).
7632 + 2213 = 9845
Circle the correct subtraction fact (by using casting out nine).
7420 − 3625 = 3795
Circle the correct multiplication fact (by using method of casting out nine).
132 × 43 = 5676
Circle the correct division fact (by using method of casting out nine).
728 ÷ 4 = 182
Circle the correct subtraction fact (by using casting out nine).
3264 − 1063 = 2200
Take any number. Now multiply it by 2, 3, 4 ............... at every step. Also, add 3 to it at each step. Look at the difference in the answer. Is it the same at every step?
Now try doing it with some other number and also take a different number to add at each step.
What if someone gives you to add ten numbers together?
Did you notice some pattern in the answers?
Number Surprises
