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15. Playing with Numbers
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Q6 of 52 Page 336

Is 111 + 211 + 311 + 411 divisible by 5? Explain.

Given, 111 + 211 + 311 + 411

We need to find out the given number is divisible by 5


No, the given number cannot be divisible by 5


Explanation:


For a number to be divisible by 5, it should end with 0 or 5.


Hence, the given number cannot be divisible by 5


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Sum of ‘n’ odd number of consecutive numbers is divisible by ‘n’. Explain the reason.

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Rahul’s father wants to deposit some amount of money every year on the day of Rahul’s birthday. On his 1st birth day Rs.100, on his 2nd birth day Rs.300, on his 3rd birth day Rs.600, on his 4th birthday Rs.1000 and so on. What is the amount deposited by his father on Rahul’s 15th birthday.

Questions · 52
15. Playing with Numbers
1 2 3 4 5 5 5 5 5 6 7 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10
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