Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 780 · 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 checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
2. 2.🧩 Vihaan is 12 years old. Ishaan is 7 years older than Vihaan. How old is Ishaan? (a) 20 (b) not enough info (c) 19 (d) 7
3. 3.🧩 Ishaan bought 3 markers and a water bottle for ₹210 in all. Each marker cost the same. What did one marker cost? (a) ₹210 (b) ₹70 (c) ₹207 (d) not enough info
4. 4.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
5. 5.🧩 Ishaan bought 2 kites for ₹80 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹40 (c) ₹80 (d) ₹45
6. 6.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 7 PM (b) not enough info (c) 4 PM (d) 8 PM
7. 7.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
9. 9.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
10. 10.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
11. 11.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
12. 12.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
13. 13.🧩 A box has 3 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 24 (b) 9 (c) not enough info (d) 18
14. 14.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
15. 15.🧩 A box has 5 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 40 (b) not enough info (c) 48 (d) 13
16. 16.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
17. 17.🧩 Vihaan bought 2 balls for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹90 (b) ₹50 (c) not enough info (d) ₹45
18. 18.🥭 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) no, check more (d) yes, it is certain
19. 19.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) for fun only (d) to change answers
20. 20.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 3 PM (d) 2 PM
21. 21.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
22. 22.🧩 Aarav bought 3 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) ₹20 (c) not enough info (d) ₹60
23. 23.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 4 PM (d) 6 PM
24. 24.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
25. 25.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) not enough info (b) 6 (c) 12 (d) 60
26. 26.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
27. 27.🧩 Saanvi is 6 years old. Tara is 5 years older than Saanvi. How old is Tara? (a) not enough info (b) 12 (c) 5 (d) 11
28. 28.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
29. 29.🧩 A box has 8 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 54 (b) 14 (c) not enough info (d) 48
30. 30.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Diya bought 5 markers and a lunch box for ₹305 in all. Each marker cost the same. What did one marker cost? (a) ₹305 (b) ₹300 (c) not enough info (d) ₹61
32. 32.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) asking your pet (d) guessing
33. 33.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
34. 34.🧩 Nisha is 9 years old. Rohan is older than Nisha. How old is Rohan? (a) not enough info (b) 11 (c) 14 (d) 10
35. 35.🧩 Ishaan is 12 years old. Saanvi is older than Ishaan. How old is Saanvi? (a) not enough info (b) 13 (c) 14 (d) 17
36. 36.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
37. 37.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 7 PM
38. 38.🧩 Saanvi is 9 years old. Tara is 6 years older than Saanvi. How old is Tara? (a) 6 (b) 16 (c) not enough info (d) 15
39. 39.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
40. 40.🧩 A box has 7 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 40 (b) 35 (c) not enough info (d) 12

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