Interactive practice questions
A group of students were asked about their siblings. The two categories show if they have at least one brother, and if they have at least one sister.
a
How many of the students have at least one sibling?
b
How many of the students have at least one brother?
c
How many of the students don't have a sister?
Easy
1min
A student creates the following diagram of their favourite animals.
Easy
< 1min
A jeweller has arranged his gems based on the cut and colour of the gem:
Cuts - triangular 
, rectangular 
, and octagonal 
Colours - amethysts 
, emeralds 
, and rubies 
Easy
< 1min
A jeweller has arranged his gems based on the cut and colour of the gem:
Cuts - triangular , rectangular , and octagonal
Colours - amethysts , emeralds , and rubies
Easy
< 1min
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