Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 737 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 A box has 3 rows of eggs, with 5 in each row. How many eggs are in the box? (a) not enough info (b) 8 (c) 15 (d) 20
2. 2.🧩 Ananya is 9 years old. Ishaan is 3 years older than Ananya. How old is Ishaan? (a) not enough info (b) 12 (c) 3 (d) 13
3. 3.🧩 A box has 8 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 15 (b) not enough info (c) 56 (d) 63
4. 4.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
5. 5.🧩 Meera is 9 years old. Rohan is older than Meera. How old is Rohan? (a) 14 (b) 11 (c) not enough info (d) 10
6. 6.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
7. 7.🧩 Ishaan is 12 years old. Arjun is older than Ishaan. How old is Arjun? (a) 13 (b) not enough info (c) 17 (d) 14
8. 8.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
9. 9.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
10. 10.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
11. 11.🧩 Diya is 12 years old. Kabir is older than Diya. How old is Kabir? (a) 13 (b) 17 (c) not enough info (d) 14
12. 12.🧩 Vihaan is 11 years old. Nisha is older than Vihaan. How old is Nisha? (a) not enough info (b) 13 (c) 12 (d) 16
13. 13.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) yes, it is certain (d) no, check more
14. 14.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) to be sure of results (d) for fun only
15. 15.🧩 Diya is 9 years old. Ishaan is 8 years older than Diya. How old is Ishaan? (a) 18 (b) not enough info (c) 8 (d) 17
16. 16.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
17. 17.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Meera is 7 years old. Rohan is 2 years older than Meera. How old is Rohan? (a) 2 (b) 10 (c) not enough info (d) 9
19. 19.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
20. 20.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 7 PM (c) not enough info (d) 8 PM
21. 21.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) guessing (d) asking your pet
22. 22.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
23. 23.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 9 PM (c) 6 PM (d) not enough info
24. 24.🧩 A box has 4 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 40 (b) 32 (c) not enough info (d) 12
25. 25.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
26. 26.🧩 Arjun bought 3 mangoes for ₹45 in all. Each mango cost the same. What did one mango cost? (a) ₹15 (b) ₹45 (c) ₹20 (d) not enough info
27. 27.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
28. 28.🧩 A box has 5 rows of apples, with 9 in each row. How many apples are in the box? (a) 14 (b) 54 (c) not enough info (d) 45
29. 29.🧩 Meera is 8 years old. Vihaan is 9 years older than Meera. How old is Vihaan? (a) not enough info (b) 9 (c) 17 (d) 18
30. 30.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
31. 31.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 40 (b) 4 (c) not enough info (d) 8
32. 32.🧩 A box has 5 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 12 (b) 42 (c) not enough info (d) 35
33. 33.🧩 Diya bought 2 notebooks and a cap for ₹40 in all. Each notebook cost the same. What did one notebook cost? (a) ₹38 (b) ₹20 (c) ₹40 (d) not enough info
34. 34.🧩 Diya is 6 years old. Ishaan is older than Diya. How old is Ishaan? (a) 7 (b) 8 (c) 11 (d) not enough info
35. 35.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
36. 36.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 8 (c) not enough info (d) 40
37. 37.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
38. 38.🧩 Ishaan bought 2 markers for ₹80 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹45 (c) ₹40 (d) ₹80
39. 39.🧩 Aarav is 6 years old. Kabir is older than Aarav. How old is Kabir? (a) 8 (b) not enough info (c) 7 (d) 11
40. 40.🧩 A box has 3 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 12 (b) not enough info (c) 27 (d) 36

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