Question

5 The number 64 has the property that it is disable by its unit digit how many whole
numbers between 10 and 50 have this property?
Q.No5

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Answer 1

Answer:

17

Step-by-step explanation:

Number ending with 1 = 21, 31, 41, 51 = 4 are divisible by 1.

Number ending with 2 = 22, 32, 42, 52 = 4 are divisible by 2.

Number ending with 3 = 33 is divisible by 3.

Number ending with 4 = 24, 44 = 2 are divisible by 4.

Number ending with 5 = 25, 35, 45, 55 = 4 are divisible by 5.

Number ending with 6 = 36 is divisible by 6.

Number ending with 8 = 48 is divisible by 8.

Number ending with 9 or 7 are not divisible by 9 or 7 respectively.

∴ Total such number which satisfy this property = 4 + 4 + 1 + 2 + 4 + 1 + 1 = 17