Northstar Learning › Brain Lab
Logic and patterns challenges
Think-it-through questions on logic and patterns, from teen to adult level, each with a clear explanation.
16 questions · free · no account needed · works offline once loaded
Start learningTry today’s daily challengeTry some questions
Tap a question to see the answer and why.
All glims are blue. Nara is a glim. What must be true?
Options: Nara is a bird · Nara is blue · All blue things are glims
Answer: Nara is blue
The rule says every glim is blue, and Nara is a glim.
Which number is both a multiple of 3 and greater than 10: 8, 12, or 14?
Options: 12 · 8 · 14
Answer: 12
12 is divisible by 3 and is greater than 10.
A code has three digits: the first is 2, the last is 8, and the middle is larger than 2 but smaller than 8. Which fits?
Options: 258 · 218 · 288
Answer: 258
The middle digit must be between 2 and 8.
Two fair coin tosses: what is the probability of exactly one head?
Options: 3/4 · 1/4 · 1/2
Answer: 1/2
The outcomes HT and TH are two of four equally likely outcomes.
If exactly one of P and Q is true, and P is false, what follows?
Options: Q is false · Both are true · Q is true
Answer: Q is true
The exclusive-or condition requires exactly one true statement.
A fair die shows an even number. Given that, what is the chance it is 6?
Options: 1/6 · 1/2 · 1/3
Answer: 1/3
The even outcomes are 2, 4 and 6; one of the three is 6.
Play with friends
Northstar also has a group quiz: host a live room, run one on a single screen, or send a friend a challenge link.
Open the group quiz