Gmaths 7_ Rational numbers and angles

Two angles are supplementary if their sum of measure equals _____________.

• $45^o$

• $90^o$

• $150^o$

• $180^o$

How many obtuse angles are there in a triangle at most?

• 0

• 1

• 2

• 3

'Rational number is fration'.

This statement are true or false?

• true

• false

Calculate: $\frac{1}{3}\times\left(-2\right)+\frac{4}{5}$  

•  $-\frac{2}{5}$  

•  $\frac{2}{15}$  

•  $\frac{2}{5}$  

•  $-\frac{2}{15}$  

Which set of numbers below is NOT subset of rational number?

• Integers

• whole numbers

• natural numbers

• irrational numbers

What is the measure of angle CAx?

• $40^o$

• $50^o$

• $60^o$

• $70^o$

Fill in the blank: 'Two acute angles in a right tringale are ______________'

• supplementary

• $180^o$

• complementary

• $360^o$

Under very specific instructions, a jeweler made one ring for the queen and one ring for the princess. The gem on the queen's ring weighed 9/10 of a carat and the stone on the princess's ring weighed 3/10 of a carat. How much heavier was the stone on the queen's ring than the stone on the princess's?

• $\frac{6}{5}$

• 1

• $\frac{4}{5}$

• $\frac{3}{5}$

Let A = 3 + 32 + 33 + 34 + ... + 3100.

Find n such that 2A + 3 = 3n

• 3204039

• 3204309

• 3243009

• 3240309

Fill in the blank.

• 40

• 80

• 120

• 160