Question
Find the smallest digit to be put in the place of the
symbol @ in the number 57@92, so that the number becomes divisible by 3.Solution
5+ 7+ @ + 9 + 2 = 23+ @ We can see that 24 is the nearest number after 23, which is divisible by 3. Hence, 23+@ = 24 Â 
@ = 24-23 = 1
More No. System Questions
40.02% of 1220.05 = ?2 + 29.09 × 7.99
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
20.11 × 6.98 + 21.03 × 6.12 – 37.95 + 92.9 × 5.02 =?
A can complete a piece of work in 15 days. B is 30% more efficient than A. If they work together, how many days will it take to complete the work?
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exactvalue.) 22.03 × 6.97 + 19.01 – 16.02 = ?
(124.99)² = ?
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