Welcome to numbersense.org!

The website of the 2025-2026 River Bend Number Sense team

Our team: "Joy","Ben","Charli","Jude","Bridget","Noah","Jonathan","Parker","Brooklyn","Rex","Hana","Gemma","Nolan","Ishaan"

Test yourself now!
Puzzlers
In a class election, Bob won and got ten more votes than second-place Rebecca. Rebecca got 6 more votes than Elizabeth, who was last.
  1. What is the minimum number of students in the class?
  2. If there were actually 34 students in the class, how many votes did each candidate get?

Farmer Fred raises chickens and pigs, and keeps them in one big pen at his farm. If there are 12 heads and 40 feet in the pen, how many chickens and pigs does he have?

What's the next number is this sequence? 0,1,5,14,30,______

I have 17 red socks in my drawer and 5 blue socks. If my room is dark in the morning and I can't see the colors, how many socks do I need to take out of the drawer to be sure I have a pair that matches?

Triangles have 3 sides. Why is it impossible to make a triangle that has side lengths of 3 inches, 5 inches and 9 inches?

Selection of old exams

2018-2019 2019-2020 2020-2021 2021-2022 2022-2023 2023-2024
Exam A
Exam B
Exam C
Exam A
Exam B
Exam C
Exam A
Exam B
Exam C
Exam A
Exam B
Exam C
Date What we covered
Tue, September 30, 2025

Introductions. Questions and Answers. Some quick and fun shortcuts.

Where do numbers come from? How big is zero?

Look around you. Numbers (and patterns) are everywhere!

Today we learned how to multiply two-digit numbers

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