Question

Find the sum of the dates enclosed in a box in the calendar given below. (2 marks)

Answer 1

Solution:
We know that the sum of all the numbers inside a 3 × 3 box in the calendar is 9 times the middle number. (1 mark)

Here, middle number = 10. (0.5 marks)
Therefore, sum of the numbers = 9 × 10 = 90 (0.5 marks)