cbse-10-maths-chap1&3

If H.C.F.(336,54)=6 find L.C.M.(336,54). Type only the number in answer.

Write the smallest number which is divisible by both 306 and 657. Type only the answer.

Sumit is 3 times as old as his son. Five years later, he shall be two and half times as old as his son. How old is Sumit at present? Type only the answer as number.

• 45

• 15

• 40

• 50

For what value of k, will the following pair of equations have infinitely many solutions: $2x+3y=7\ and\ \left(k+2\right)x-3\left(1-k\right)y=5k+1$  

• 4

• -7

•  $\ne4$  

• 3

Choose the rational number between $\sqrt{2}\ and\ \sqrt{3}$   

• 1.5

• 1.4

• 1.8

• 1

A father's age is three times the sum of the ages of his two children. After 5 years his age will be two times the sum of their ages. Find the present age of the father.

A fraction becomes 1/3 when 2 is subtracted from the numerator and it becomes 1/2 when 1 is subtracted from the denominator. Find the numerator of fraction.

Solve:
y = 7x + 9
2y + 2x = -18

• (5, 0)
• (9, 18)
• (-2, -5)
• (1, 16)

Tags

CCSS.HSA.REI.C.6

CCSS.8.EE.C.8B

Solve:
x = -3y - 17
2x + 3y = -7

• (1, -20)
• (3, 0)
• (-5, -2)
• (10 , -9)

Tags

CCSS.HSA.REI.C.9

What is the solution to this system?
y = x + 5
4x + y = 20

• (3,8)
• (8,3)
• (0,2)
• (2,0)

Tags

CCSS.8.EE.C.8