Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 976 · 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.🧩 Tara is 7 years old. Vihaan is 2 years older than Tara. How old is Vihaan? (a) 2 (b) 10 (c) not enough info (d) 9
2. 2.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
3. 3.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
4. 4.🧩 A box has 3 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 16 (b) not enough info (c) 7 (d) 12
5. 5.🧩 Meera is 12 years old. Saanvi is older than Meera. How old is Saanvi? (a) 13 (b) 14 (c) 17 (d) not enough info
6. 6.🧩 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
7. 7.🧩 Vihaan bought 2 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹100 (c) not enough info (d) ₹55
8. 8.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 70 (b) 7 (c) 14 (d) not enough info
9. 9.🧩 Ananya bought 2 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) ₹20 (c) ₹40 (d) not enough info
10. 10.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
11. 11.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing
12. 12.🧩 Ishaan bought 2 markers for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹90 (b) ₹50 (c) ₹45 (d) not enough info
13. 13.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 80 (b) 8 (c) 16 (d) not enough info
14. 14.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) all dogs are mean (d) never see dogs
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Tara is 12 years old. Rohan is older than Tara. How old is Rohan? (a) 13 (b) 14 (c) 17 (d) not enough info
18. 18.🧩 Rohan bought 5 mangoes for ₹200 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹200 (c) ₹40 (d) ₹45
19. 19.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
20. 20.🧩 A box has 6 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 35 (b) not enough info (c) 30 (d) 11
21. 21.🧩 Meera is 7 years old. Tara is 2 years older than Meera. How old is Tara? (a) not enough info (b) 2 (c) 9 (d) 10
22. 22.🧩 Ananya bought 5 kites and a bag for ₹340 in all. Each kite cost the same. What did one kite cost? (a) ₹340 (b) not enough info (c) ₹68 (d) ₹335
23. 23.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 4 PM
24. 24.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
25. 25.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 5 PM (c) 4 PM (d) not enough info
26. 26.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
27. 27.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
28. 28.🧩 Vihaan bought 5 notebooks and a bag for ₹175 in all. Each notebook cost the same. What did one notebook cost? (a) ₹170 (b) ₹175 (c) not enough info (d) ₹35
29. 29.🧩 Ishaan is 8 years old. Tara is 6 years older than Ishaan. How old is Tara? (a) 6 (b) not enough info (c) 14 (d) 15
30. 30.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
31. 31.🧩 Diya is 6 years old. Aarav is older than Diya. How old is Aarav? (a) 8 (b) not enough info (c) 11 (d) 7
32. 32.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 12 (b) 60 (c) not enough info (d) 6
33. 33.🧩 A box has 4 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 25 (b) not enough info (c) 20 (d) 9
34. 34.🧩 Kabir is 10 years old. Arjun is 9 years older than Kabir. How old is Arjun? (a) 20 (b) 9 (c) 19 (d) not enough info
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
36. 36.🧩 Nisha is 7 years old. Arjun is older than Nisha. How old is Arjun? (a) 9 (b) not enough info (c) 8 (d) 12
37. 37.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
38. 38.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
39. 39.🧩 Meera bought 4 notebooks and a water bottle for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) ₹62 (b) ₹246 (c) ₹250 (d) not enough info
40. 40.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True

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