Every whole number has its successor.

A square park is surrounded by 1cm wide path. If area of the path is 136 sq cm, find the area of the park.

Find the value of 198 - 2 × 15 ÷ 3 × 6

The ratio of 8 books to 20 books is

1 is the identity for addition of whole numbers.

ABCD is a given rectangle with length as 90 cm and breadth as 80 cm. P, Q, R, S are the mid-points of sides AB, BC, CD, DA, respectively. A circular rangoli of diameter 20 cm is drawn at the centre as shown in the given figure. Find the area of shaded portion.

|p - q| = |p| - |q|, where p and q are natural numbers and p < q.

The least integer lying between –10 and –15 is

The HCF of two consecutive numbers is

The expanded form of the number 9578 is

If the sides of a rectangle are increased to twice its original lengths, how much will the perimeter of the new rectangle increase?

Number of even numbers between 58 and 80 is

Two brands of chocolates are available in the packs of 50 and 20 respectively. Chetna wants to buy the same number of chocolates of both the brands. What is the least number of packs of each brand of chocolates that she will need to buy?

Write the smallest and the largest seven digit numbers that you can form using the digits: 6, 2, 3, 7, 0, 9 and 5, without repeating the digits.

Find the value of 39 ÷ 13 × 3 – 10 ÷ 5 + 1

Which of the following statements is not true?

Natural numbers are closed under subtraction.

Which of the following numbers in Roman numerals is incorrect?