Three friends have a number card each.
Gowri’s number ends with digit 7.
Asha’s number ends with digit 5.
Varun’s number ends with digit 4.
If ALL the three numbers are multiplied, the digit in which place(s) can be identified.
a) Only ones place
b) both tens and ones place
c) neither tens or ones place
d) both tens and hundreds place
Answers
Answer:
If all the digit multiplied :5×7×4=140
HTO
140
1 comes on hundreds place
4 comes on tens place
0 comes on one's place
Answer:
If all the three numbers are multiplied, the digit one's place(s) can be identified.
Step-by-step explanation:
Given,
The number card of Gowri ends with the digit 7.
The number card of Asha ends with the digit 5.
The number card of Varun ends with the digit 4.
To find,
The digit in the number, if all the numbers of the friends get multiplied.
Calculation,
When we multiply the numbers ending with 7, 5, and 4 digits. We will actually add up some numbers in the ten's place. So in the resultant number, the ten's place is unpredictable and it changes according to the numbers we are multiplying.
E.g. When we multiply 17 and 15, then we get 255 and if we multiply 255 by 14 we get 3570.
So, here when we are multiplying the three numbers ending with the digits 7, 5, and 4 the digit in the one's place is always fixed and it is equal to zero. But the digits in the remaining places change according to the numbers we are multiplying.
Therefore, if all the three numbers are multiplied, the digit one's place(s) can be identified.
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