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Grade 9

ASSET Question-A-Day | 24 May 2019

Grade 9 | Maths

The average height of students in a class is 160 cm. Two students whose height are 145 cm and 175 are newly admitted to the class. How will the average height of the class change because of this?
A
It will increase.
B
It will decrease.
C
It will remain the same.
D
(Nothing can be said as the total number of students is not known.)

Yesterday's Question | Science

In a deep valley on the Earth, a person shouting will hear an echo as the sound is reflected back off the surrounding mountains.
In a similar valley on the Moon, no echo will be heard. This is because_______________.

A
the gravitational pull on the Moon is too low
B
the temperature on the Moon is too low
C
there is no air on the Moon for the sound to travel through
D
the mountains on the Moon cannot reflect sound.

Correct Answer: C