Math · Stage 1
Find a secret number from two clues (bigger than / smaller than)
Use one clue to open a door and the other to close it — the secret number is the one that fits BOTH.
✦ Math📘 Stage 1 · S1⏱ ~10 min🧒 Ages 5–6★ Free to start
I can find a secret number from two clues (bigger than / smaller than) and check it fits both.
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Kavi's Secret Number 🔢
Kavi hides a number and gives two clues 🕵️: "It's bigger than 3 and smaller than 5." Kavi thinks out loud: "Bigger than 3 means 4, 5, 6… Smaller than 5 means 4, 3, 2… The only number on both lists is 4 — and 4 fits both clues, so that's my secret number!"
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What your child will learn
1Each clue points one wayPicture the numbers on a line. Bigger than 3 points right of 3 — so 4, 5, 6, 7 … Smaller than 7 points left of 7 — so 6, 5, 4 … The hop line helps you see the numbers each clue allows.
2Keep only the numbers that fit bothLine up 1 to 10. Cross off everything 3 and smaller (the first clue says bigger than 3). Then cross off everything 7 and bigger (smaller than 7). Whatever is left fits both.
3Close clues pin ONE numberWhen the two clues are right next to each other, only one number can fit. Bigger than 5 and smaller than 7: the only number squeezed between is 6.
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A peek inside
My secret number is bigger than 3 and smaller than 5. What is it?
bigger than 3: 4,5,6 · smaller than 5: 4,3 · both: 4
Try this at home: Find the secret number: bigger than 5 and smaller than 7.
Ready to play and learn?
Start the free interactive lesson, or print the handout for screen-free play.
Part of Math · Stage 1 · S1 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.