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If 21y5 is a multiple of 9, where y is d...

If 21y5 is a multiple of 9, where y is digit, what is the value of y?

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ASHOK PUBLICATION ASSAM-Playing with Numbers-EXAMPLE
  1. Find the values of the letters in each of the following and give reaso...

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  2. Find the values of the letters in each of the following and give reaso...

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  3. If 21y5 is a multiple of 9, where y is digit, what is the value of y?

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  4. If 31z5 is a multiple of 9, where z is a digit, what is the value of z...

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  5. If 24x is a multiple of 3, where x is a digit what is the value of x?

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  6. Write the following numbers in generalised form. 25

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  7. Write the following numbers in generalised form. 73

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  8. Write the following numbers in generalised form. 129

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  9. Write the following numbers in generalised form. 302

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  10. Write the following in the usual form. 10xx 5 + 6

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  11. Write the following in the usual form. 100xx 7 + 10 xx 1 + 8

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  12. Write the following in the usual form. 100 xx a + 10 xx c +b

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  13. Check what the result would have been of the sum of chosen number and ...

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  14. Check what the result would have been of the sum of chosen number and ...

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  15. Check what the result would have been of the sum of chosen number and ...

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  16. Check what the result would have been of the sum of chosen number and ...

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  17. Check what the result would have been of the difference of chosen numb...

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  18. Check what the result would have been of the difference of chosen numb...

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  19. Check what the result would have been of the difference of chosen numb...

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  20. Check what the result would have been of the difference of chosen numb...

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