Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 15 · 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.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
2. 2.🧩 Aarav is 10 years old. Arjun is older than Aarav. How old is Arjun? (a) 15 (b) not enough info (c) 12 (d) 11
3. 3.🧩 A box has 6 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 35 (b) not enough info (c) 11 (d) 30
4. 4.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
5. 5.🧩 A box has 7 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 42 (b) 13 (c) 48 (d) not enough info
6. 6.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
7. 7.🧩 Arjun is 7 years old. Rohan is older than Arjun. How old is Rohan? (a) 12 (b) 9 (c) 8 (d) not enough info
8. 8.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
9. 9.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 14 (b) 7 (c) 70 (d) not enough info
10. 10.🧩 Ananya bought 4 mangoes for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹25 (b) not enough info (c) ₹100 (d) ₹30
11. 11.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) all dogs are mean (d) dogs hate you
12. 12.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
13. 13.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no, check more (c) yes, it is certain (d) no mango is sweet
14. 14.🧩 Meera bought 4 pens and a lunch box for ₹160 in all. Each pen cost the same. What did one pen cost? (a) ₹160 (b) not enough info (c) ₹40 (d) ₹156
15. 15.🧩 Nisha bought 5 balls and a lunch box for ₹305 in all. Each ball cost the same. What did one ball cost? (a) ₹305 (b) ₹300 (c) ₹61 (d) not enough info
16. 16.🧩 Vihaan bought 3 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹35 (b) not enough info (c) ₹90 (d) ₹30
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.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
19. 19.🧩 Rohan bought 4 markers for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹80 (b) ₹25 (c) ₹20 (d) not enough info
20. 20.🧩 Arjun is 8 years old. Vihaan is 4 years older than Arjun. How old is Vihaan? (a) 13 (b) 12 (c) 4 (d) not enough info
21. 21.🧩 Meera is 9 years old. Tara is older than Meera. How old is Tara? (a) 11 (b) 10 (c) 14 (d) not enough info
22. 22.🧩 Aarav is 11 years old. Ishaan is older than Aarav. How old is Ishaan? (a) 16 (b) 12 (c) 13 (d) not enough info
23. 23.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
24. 24.🧩 Kabir bought 3 balls for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹150 (b) not enough info (c) ₹50 (d) ₹55
25. 25.🧩 A box has 4 rows of oranges, with 7 in each row. How many oranges are in the box? (a) not enough info (b) 28 (c) 11 (d) 35
26. 26.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
27. 27.🧩 Kabir bought 6 pens and a bag for ₹160 in all. Each pen cost the same. What did one pen cost? (a) ₹154 (b) not enough info (c) ₹160 (d) ₹26
28. 28.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) not enough info (c) 3 PM (d) 6 PM
29. 29.🧩 A box has 4 rows of apples, with 6 in each row. How many apples are in the box? (a) 10 (b) 30 (c) 24 (d) not enough info
30. 30.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 32 (c) 12 (d) 36
31. 31.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
32. 32.🧩 Ananya is 7 years old. Tara is 2 years older than Ananya. How old is Tara? (a) 9 (b) not enough info (c) 10 (d) 2
33. 33.🧩 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
34. 34.🧩 Tara bought 5 kites for ₹100 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹100 (c) ₹20 (d) ₹25
35. 35.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
36. 36.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
37. 37.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking your pet (c) asking the whole class (d) asking one friend
38. 38.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
39. 39.🧩 Arjun bought 5 markers for ₹300 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹65 (c) ₹300 (d) ₹60
40. 40.🧩 Tara is 11 years old. Aarav is older than Tara. How old is Aarav? (a) not enough info (b) 12 (c) 13 (d) 16

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