Question
What did a recent study led by Dr. Babula Jena and
colleagues from the National Centre for Polar and Ocean Research, in collaboration with the British Antarctic Survey, report?Solution
The study reported unprecedented hindrance in Antarctic ice expansion and ice retreat ahead of the annual ice maximum in 2023.
Sum of digits of a two-digit number is 9. When 27 is subtracted from the number, its digits get interchanged. Find the original number.
There are 5680 children in a school. For Republic day Parade they have to stand in such a manner that the number of rows is equal to number of columns. ...
Find the average of first 21 whole numbers.
- If the number 8357pt is divisible by 15, how many values can 'p' take?
Ravi has 90 pens of two different brands i.e., Parker and Cello. If he bought 30 more Parker pens, the ratio of number of Cello to Parker pens with him ...
If the numerator of a fraction is increased by 10% and the denominator is reduced by 20%, the resulting fraction is 11/6. What was the original fraction?

What should come in place of question mark (?) in the following questions? Find the exact value.
A positive number becomes 9 times its reciprocal when 3 is added to it. Find this number.
How many 4-digit numbers can be formed from digits 1β9 (no repetition) such that the number is divisible by 3?