Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 964 · 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.🧩 Kabir is 11 years old. Diya is older than Kabir. How old is Diya? (a) 13 (b) 12 (c) not enough info (d) 16
2. 2.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
3. 3.🧩 A box has 4 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 35 (b) 11 (c) not enough info (d) 28
4. 4.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
5. 5.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
6. 6.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
7. 7.🧩 Vihaan is 12 years old. Arjun is older than Vihaan. How old is Arjun? (a) 17 (b) 13 (c) not enough info (d) 14
8. 8.🧩 Saanvi bought 2 mangoes and a bag for ₹90 in all. Each mango cost the same. What did one mango cost? (a) ₹88 (b) ₹45 (c) ₹90 (d) not enough info
9. 9.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 9 PM (d) 8 PM
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
12. 12.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
13. 13.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
14. 14.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
15. 15.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
16. 16.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 7 PM
17. 17.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking your pet (d) asking one friend
18. 18.🧩 Rohan bought 5 kites for ₹75 in all. Each kite cost the same. What did one kite cost? (a) ₹75 (b) ₹20 (c) not enough info (d) ₹15
19. 19.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
20. 20.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
21. 21.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 4 PM (c) 5 PM (d) not enough info
22. 22.🧩 Vihaan bought 2 notebooks and a lunch box for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹110 (c) ₹108 (d) ₹55
23. 23.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 9 PM (d) 6 PM
24. 24.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
25. 25.🧩 A box has 6 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 42 (b) not enough info (c) 36 (d) 12
26. 26.🧩 Diya bought 4 notebooks and a water bottle for ₹230 in all. Each notebook cost the same. What did one notebook cost? (a) ₹230 (b) ₹226 (c) ₹57 (d) not enough info
27. 27.🧩 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
28. 28.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
29. 29.🧩 Ananya bought 5 pens for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) ₹20 (c) ₹100 (d) not enough info
30. 30.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
31. 31.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) not enough info (b) 70 (c) 14 (d) 7
32. 32.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
33. 33.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
34. 34.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 3 PM (d) 5 PM
35. 35.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
36. 36.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
37. 37.🧩 Rohan bought 4 balls for ₹100 in all. Each ball cost the same. What did one ball cost? (a) ₹30 (b) ₹100 (c) not enough info (d) ₹25
38. 38.🧩 Diya bought 6 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹120 (b) not enough info (c) ₹20 (d) ₹25
39. 39.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, mangoes match (d) yes, it is certain
40. 40.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True

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