Dev thinks of a whole number.He multiplies it by 4.He rounds his answer to the nearest 10.The result is 50.
1 answer:
There is only one answer, which is 4×12. Because 4×12=48, then rounded is 50, but 4×11=44 and can't be rounded to 50, and 4×13=52 and can't be rounded to 50.
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