Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 381 · 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.🧩 Nisha is 11 years old. Arjun is 2 years older than Nisha. How old is Arjun? (a) 14 (b) not enough info (c) 2 (d) 13
2. 2.🧩 Rohan bought 4 markers and a lunch box for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹236 (b) ₹240 (c) not enough info (d) ₹60
3. 3.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
4. 4.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
5. 5.🧩 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
6. 6.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) the colour of ink (d) your handwriting
7. 7.🧩 Meera bought 2 markers for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹25 (c) ₹30 (d) not enough info
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
9. 9.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
10. 10.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
11. 11.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 10 (b) 5 (c) 50 (d) not enough info
12. 12.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Saanvi bought 4 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) ₹100 (c) ₹30 (d) not enough info
14. 14.🧩 Aarav bought 5 pens and a lunch box for ₹115 in all. Each pen cost the same. What did one pen cost? (a) ₹110 (b) ₹23 (c) not enough info (d) ₹115
15. 15.🧩 Kabir is 7 years old. Diya is 7 years older than Kabir. How old is Diya? (a) 15 (b) 7 (c) 14 (d) not enough info
16. 16.🥭 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 mango is sweet (c) no, check more (d) yes, it is certain
17. 17.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
18. 18.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
19. 19.🧩 Kabir bought 4 balls and a lunch box for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹196 (b) ₹50 (c) not enough info (d) ₹200
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
21. 21.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
22. 22.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) a guess (d) facts that support it
23. 23.🧩 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
24. 24.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
25. 25.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
26. 26.🧩 Meera bought 5 balls and a bag for ₹320 in all. Each ball cost the same. What did one ball cost? (a) ₹320 (b) not enough info (c) ₹64 (d) ₹315
27. 27.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
28. 28.🧩 Ishaan bought 5 pens for ₹275 in all. Each pen cost the same. What did one pen cost? (a) ₹275 (b) ₹55 (c) not enough info (d) ₹60
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
30. 30.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
31. 31.🧩 Nisha bought 4 pens and a lunch box for ₹310 in all. Each pen cost the same. What did one pen cost? (a) ₹306 (b) ₹310 (c) ₹77 (d) not enough info
32. 32.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 3 PM (c) 4 PM (d) not enough info
33. 33.🧩 A box has 5 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 36 (b) 30 (c) 11 (d) not enough info
34. 34.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
35. 35.🧩 A box has 8 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 63 (b) 15 (c) 56 (d) not enough info
36. 36.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
37. 37.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) not enough info (b) 4 (c) 8 (d) 40
38. 38.🧩 Ishaan bought 3 markers for ₹135 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹135 (c) not enough info (d) ₹45
39. 39.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 10 (b) 50 (c) 5 (d) not enough info
40. 40.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) that one dog barked (d) dogs hate you

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