Class 6 math

Which is incorrect?

• A symbol or letter has fixed value is called a constant.

• 1,2,3,.....are constant.

• If a represents lengh of side of triangle ,then a is called constant.

• x,y,z are Constants

• length of rectangle is x and its breathing y then A=xy

Which is incorrect?

• A symbol or letter has more than one Value is called Variable. (एक भन्दा बढी मान भयका सङ्केत वा अक्षरलाई चर भनिन्छ)

• x,y,z are variables.

• y represents number between between 10 to 20.

• 1,2,3,..are variables.

Which is incorrect?

• 3x + 7x=10x

• 7c- 5c=2c

• 30a÷2=15a

• 40y-3e=37yc

Which is incorrect ?

• V= lxbxh

• A=lxb

• P=2(l+b)

• A=l+b

Which is incorrect ?

• V= lxbxh

• A=lxb

• P=2(l+b)

• A=l+b

Which is incorrect ?

• $6z,-12x,\frac{3}{4xz},mn,2p,\frac{3x}{4},\frac{7}{12k},\frac{-pt}{2m}are\ variable.$

• $1.5\ ,\frac{7}{5},0,\frac{1}{2}$ are constants.

• x is variable and 7 is constant but together x - 7 is Variable.

• 6 is a constant and z is variable 6z is variable.

with is incorrect?

• In 5y+ 9 , 5x is Variable and 9 is constant.

• in 3x-5y+4 ,3x and 5y are variables and 4 is constant.

• a quality which takes a fixed numerical value is called variable.

• 3x and 18x are like terms.

• 5a and 6b unlike items

Click in correct?

• when the number and symbols are connected with + ,- ,× and ÷ the result is algebraic expression.

• a+5,y-4,8x-2xy are examples of algebraic expression.

• 3z is monomial, 8a-5b is binomial 9a-26b+24c is trinomial and x-2y+6z+7 is examples of Polynomial.

• all of the above

which is incorrect?

• if x=3 y=6 and z=2 then numerical value of 2x+y-z=2 × 3 + 6 - 2 =6+6-2=12-2=10

• the sum of 3x and 4x=3x +4x=7xy

• the sum of 2x-4y and - 4x- 3y=(2x-4y)+(-4× - 3x)=2× -4y-4×-3x= -2x-7y

• Subtract 5xy from 15xy=15xy -5xy=10xy

• Subtract -3x -6y from -5×-7y =(-5x-7y) - (-3x - 6y)= -5x -7y +3x + 6y= - 2x-y

select incorrect one from below.

• 4xyz÷2x=2xy

• (-2a)x(+3bc)= - 6abc

• (- 3eh)x(-5fg)=(+15efgh)=15efgh

• - 2x + 5x=-3x