Today's question

Using eight 8s, try to get the value of 1000. Post your answers as comment.

Calculation race

Ask your friend to write any two-digit number and multiply it manually by 3367.

You will always be able to get the answer before him/her without a calculator.

Example: If your friend chooses 53, then write 535353 and divide it by 3.

Thus, 535353/3 = 178451

Check: 53 x 3367 = 178451

Trick: Write the two-digit number thrice and divide it by 3.

Answer to previous question

The possible solutions to the question are:

98765 + 1234 = 99999

97864 + 2135 = 99999

96125 + 3874 = 99999

Today's question

 Make two numbers using each digit from 1 to 9 only once. The sum of the numbers must be 99999. Can you do it? There can be more than one possibility. Post your answers as comment.

Easy multiplication by 9

To multiply a number by 9, multiply it by 10 and then subtract the original number.

Example: To multiply 139 by 9, first multiply 139 by 10.

139 x 10 = 1390

Next subtract 139 from 1390.

1390 – 139 = 1251

Thus 139 x 9 = 1251

Answer to previous question

The answer to previous question is 4913. 4 + 9 + 1 + 3 = 17.

17 x 17 x 17 = 4913.