Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 314 · 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: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
2. 2.🧩 Ishaan is 6 years old. Nisha is 9 years older than Ishaan. How old is Nisha? (a) 16 (b) not enough info (c) 15 (d) 9
3. 3.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
4. 4.🧩 Arjun bought 3 notebooks and a cap for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹57 (c) ₹60 (d) ₹20
5. 5.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
6. 6.🧩 Tara bought 3 mangoes and a water bottle for ₹50 in all. Each mango cost the same. What did one mango cost? (a) ₹16 (b) not enough info (c) ₹47 (d) ₹50
7. 7.🧩 Aarav bought 4 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹15 (c) not enough info (d) ₹60
8. 8.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
9. 9.🧩 Kabir is 11 years old. Vihaan is 8 years older than Kabir. How old is Vihaan? (a) 20 (b) 8 (c) not enough info (d) 19
10. 10.🧩 Rohan bought 4 pens and a water bottle for ₹250 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹250 (c) ₹62 (d) ₹246
11. 11.🧩 A box has 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 9 (b) 20 (c) not enough info (d) 24
12. 12.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
13. 13.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
14. 14.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
15. 15.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
16. 16.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
17. 17.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
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.🧩 Kabir is 7 years old. Rohan is older than Kabir. How old is Rohan? (a) 8 (b) 9 (c) 12 (d) not enough info
20. 20.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
21. 21.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a rumour (d) a guess
22. 22.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 16 (b) 80 (c) not enough info (d) 8
23. 23.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 5 (b) 10 (c) not enough info (d) 50
24. 24.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
25. 25.🧩 Kabir bought 4 pens and a lunch box for ₹140 in all. Each pen cost the same. What did one pen cost? (a) ₹140 (b) ₹35 (c) not enough info (d) ₹136
26. 26.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
27. 27.🧩 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
28. 28.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 7 PM (c) 6 PM (d) not enough info
29. 29.🧩 Aarav is 12 years old. Arjun is older than Aarav. How old is Arjun? (a) 13 (b) 17 (c) not enough info (d) 14
30. 30.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
32. 32.🧩 Vihaan is 8 years old. Diya is older than Vihaan. How old is Diya? (a) not enough info (b) 13 (c) 9 (d) 10
33. 33.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) asking your pet (d) guessing
34. 34.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 3 PM
35. 35.🧩 Nisha is 7 years old. Saanvi is 9 years older than Nisha. How old is Saanvi? (a) 17 (b) 9 (c) not enough info (d) 16
36. 36.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 9 PM (c) not enough info (d) 8 PM
37. 37.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 8 PM
38. 38.🧩 Saanvi bought 6 mangoes and a lunch box for ₹370 in all. Each mango cost the same. What did one mango cost? (a) ₹364 (b) ₹61 (c) ₹370 (d) not enough info
39. 39.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 8 (b) 80 (c) not enough info (d) 16
40. 40.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence

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