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20 August, 05:11

A number is thrift if it is a multiple of 2 or 3. How many thrift numbers are there between - 15 and 15

(a) 18 (b) 9 (c) 19 (d) 15

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  1. 20 August, 08:23
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    (a) 19.

    Step-by-step explanation:

    The even numbers in the given range are - 14, - 12, - 10, - 8, - 6, - 4 and - 2. and 7 more of their positive values. Total 14.

    The numbers divisible by 3 and not 2 are - 9, - 3, 3 and 9.

    Also 0 is a multiple of any number

    Thus, number of thrift numbers are 14 + 4 + 1 = 19 (answer).
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