Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 502 · 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.🧩 Rohan bought 4 markers for ₹80 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹25 (c) ₹20 (d) ₹80
2. 2.🧩 Ishaan bought 4 kites and a water bottle for ₹180 in all. Each kite cost the same. What did one kite cost? (a) ₹176 (b) ₹180 (c) not enough info (d) ₹45
3. 3.🧩 Ananya bought 4 mangoes and a lunch box for ₹150 in all. Each mango cost the same. What did one mango cost? (a) ₹37 (b) ₹150 (c) ₹146 (d) not enough info
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) that one dog barked (c) dogs hate you (d) all dogs are mean
5. 5.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives 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) False (b) True
7. 7.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
8. 8.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
9. 9.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
10. 10.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
11. 11.🧩 Nisha bought 6 balls for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹90 (c) not enough info (d) ₹15
12. 12.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
14. 14.🥭 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) yes, it is certain (c) yes, mangoes match (d) no mango is sweet
15. 15.🧩 Nisha bought 4 pens and a bag for ₹220 in all. Each pen cost the same. What did one pen cost? (a) ₹55 (b) ₹216 (c) ₹220 (d) not enough info
16. 16.🧩 Arjun bought 4 notebooks for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) ₹220 (b) ₹55 (c) not enough info (d) ₹60
17. 17.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
18. 18.🧩 Rohan bought 5 mangoes for ₹125 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) not enough info (c) ₹125 (d) ₹25
19. 19.🧩 Nisha is 6 years old. Ananya is older than Nisha. How old is Ananya? (a) 8 (b) not enough info (c) 7 (d) 11
20. 20.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
21. 21.🧩 Nisha is 12 years old. Aarav is 9 years older than Nisha. How old is Aarav? (a) 21 (b) 9 (c) 22 (d) not enough info
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) asking one friend (d) guessing
23. 23.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 3 PM (d) not enough info
24. 24.🧩 Meera bought 4 kites and a lunch box for ₹180 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹176 (c) ₹180 (d) ₹45
25. 25.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
26. 26.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 7 PM (c) not enough info (d) 6 PM
27. 27.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
28. 28.🧩 Ananya bought 2 markers and a cap for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹48 (b) ₹25 (c) ₹50 (d) not enough info
29. 29.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
30. 30.🧩 Aarav is 9 years old. Ananya is older than Aarav. How old is Ananya? (a) 14 (b) 10 (c) 11 (d) not enough info
31. 31.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) what facts are given (d) the page number
32. 32.🧩 A box has 6 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 48 (b) 14 (c) 56 (d) not enough info
33. 33.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
34. 34.🧩 A box has 5 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 11 (b) not enough info (c) 30 (d) 36
35. 35.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 3 PM (c) 4 PM (d) 2 PM
36. 36.🧩 Tara is 8 years old. Nisha is 9 years older than Tara. How old is Nisha? (a) 9 (b) not enough info (c) 17 (d) 18
37. 37.🧩 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
38. 38.🧩 Nisha bought 4 notebooks and a cap for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹32 (c) ₹126 (d) ₹130
39. 39.🧩 Ishaan bought 5 kites for ₹250 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹50 (c) ₹55 (d) ₹250
40. 40.🧩 A box has 3 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 12 (b) 16 (c) not enough info (d) 7

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