EASY
10th CBSE
IMPORTANT
Earn 100

Check whether the following number is prime or composite

7×11×13+13

100% studentsanswered this correctly

Important Questions on Number System

EASY
10th CBSE
IMPORTANT
New Mathematics for Class X>Chapter 1 - Number System>EXERCISE>Q 14

Check whether the following number is prime or composite.

3×7+2

EASY
10th CBSE
IMPORTANT
New Mathematics for Class X>Chapter 1 - Number System>EXERCISE>Q 14

Check whether the following number is Prime Number / Composite Number

13×17×19+23×28

MEDIUM
10th CBSE
IMPORTANT
New Mathematics for Class X>Chapter 1 - Number System>EXERCISE>Q 15
A rectangular field is 150 m×60 m. Two cyclists Karan and Vijay start together and can cycle at speed of 21 m/min and 28 m/min, respectively. They cycle along the rectangular track, around the field from the same point and at the same moment. After how many minutes will they meet again at the starting point?
MEDIUM
10th CBSE
IMPORTANT
New Mathematics for Class X>Chapter 1 - Number System>EXERCISE>Q 16
Radius of a circular track is 63 m. Two cyclists Amit and Ajit start together from the same position, at the same time and in the same direction with speeds 33 m/min and 44 m/min. After how many minutes they meet again at the starting point? Take π=227.
MEDIUM
10th CBSE
IMPORTANT
New Mathematics for Class X>Chapter 1 - Number System>EXERCISE>Q 17
On a morning walk, three persons step off together and their steps measure 40 cm, 42 cm and 45 cm, respectively. If the minimum distance each should walk so that each can cover the same distance in complete steps is equal to k cm, then find the value of k.
EASY
10th CBSE
IMPORTANT
New Mathematics for Class X>Chapter 1 - Number System>EXERCISE>Q 18
An army contingent of 455 members is to march behind an army band of 42 members in a parade. The two groups are to march in the same number of columns. What is the maximum number of columns in which they can march?
MEDIUM
10th CBSE
IMPORTANT
New Mathematics for Class X>Chapter 1 - Number System>EXERCISE>Q 19
Three sets of English, Hindi and Mathematics books have to be stacked in such a way that all the books are stored topic wise and the height of each stack is the same. The number of English books is 96, the number of Hindi books is 240 and the number of Mathematics books is 336. Assuming that the books are of the same thickness, determine the number of stacks of English, Hindi and Mathematics books.
MEDIUM
10th CBSE
IMPORTANT
New Mathematics for Class X>Chapter 1 - Number System>EXERCISE>Q 20
In a delegation of students there are 60 Indian, 84 Chinese and 108 British. They all want to stay in the same hotel. The number of students stay in each same room is same and will also stay with their own country students. Find the minimum number of rooms required for stay of these students.